How to find and identify keyboard shortcuts?
In User Preferences, (menu entry Edit&gt; Preferences&gt; Keymap) you'll see an exhaustive list of the currently set keyboard shortcuts.
There is also a handy search bar in there to search through them. You can search by name (default) or change it to search by key binding by clicking on the little dropdown to the left of the search bar.
You can find more info about it at the Blender Manual.